Science fiction edges ever closer to reality as researchers at NC State University devise a form of propulsion that can accelerate microbots through the human bloodstream. The challenge: not only finding a way to create this engine on such a tiny scale, but to provide power to it. The solution? Diode propulsion, using current sent to the little engine remotely, exciting its little diode with an electrical field.

But these clever scientist dudes aren't done yet. Now they have to figure out how to make a sensing robot small enough to wind its way through the bloodstream, and they'll need a bit more horsepower, too. But this is an auspicious start, and soon, little bots reminiscent of Innerspace and that sub from Fantastic Voyage might be sniffing around inside your bloodstream. – Charlie White